package com.ots.project.tool.exam;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.JavaType;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.List;
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public class JsonUtil {
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private static final ObjectMapper MAPPER = new ObjectMapper();
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private static final Logger logger = LoggerFactory.getLogger(JsonUtil.class);
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public static <T> String toJsonStr(T o) {
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try {
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return MAPPER.writeValueAsString(o);
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} catch (JsonProcessingException e) {
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}
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return null;
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}
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public static <T> T toJsonObject(String json, Class<T> valueType) {
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try {
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return MAPPER.<T>readValue(json, valueType);
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} catch (IOException e) {
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}
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return null;
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}
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public static <T> List<T> toJsonListObject(String json, Class<T> valueType) {
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try {
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JavaType getCollectionType = MAPPER.getTypeFactory().constructParametricType(List.class, valueType);
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List<T> list = MAPPER.readValue(json, getCollectionType);
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return list;
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} catch (IOException e) {
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logger.error("异常：{}",e.getMessage(), e);
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}
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return null;
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}
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public static <T> T toJsonObject(InputStream stream, Class<T> valueType) {
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try {
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T object = MAPPER.<T>readValue(stream, valueType);
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return object;
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} catch (IOException e) {
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logger.error(e.getMessage(), e);
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}
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return null;
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}
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public static String toJSONString(Object object) {
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try {
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return JSONObject.toJSONString(object);
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} catch (Exception e) {
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return "";
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}
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}
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public static <T> T parseObject(String text, Class<T> clazz) {
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try {
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return JSONObject.parseObject(text, clazz);
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} catch (Exception e) {
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return null;
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}
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}
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public static <T> List<T> parseArray(String text, Class<T> clazz) {
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try {
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return JSONArray.parseArray(text, clazz);
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} catch (Exception e) {
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return null;
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}
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}
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}
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